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Section XI. MAINTENANCE OF FAN MOTOR
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TM-5-4120-337-14 Air Conditioner Vertical: Compact Self-Contained Air Cooled Electrical Motor Driven Manual
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Figure 4-1. Fan Motor Removal and Installation.
protector to cool and close. If a resistance check still
(2) Remove the evaporator fan (para 4-30).
i n d i c a t e s open circuits to all four pins from C, the
(3) Disconnect the electrical connector from
thermal protector is defective and motor must be
t h e terminal box located on the lower portion of the
motor housing near the motor mounting flange.
r e p l a c e d . An open circuit from C to some, but not
a l l the remaining pins is evidence that one or more
(4) Remove the two screws, washers, lock
washers and sleeves which secure the motor
of the windings is open circuited and the motor
must be replaced.  Connect one lead of the
mounting feet to the motor mounting bracket.
m u l t i m e t e r to the motor frame and the second lead
( 5 ) Remove the four nuts, washers and screws
to each of the five pins in the receptacle. An in-
which secure the motor mounting flange to the
dication of negligible resistance is evidence of a
bulkhead separating the evaporator and condenser
short in the motor and it must be replaced.
compartments.
(6) Lift the motor out of the air conditioner,
4-34. Fan Motor Removal and Installation
b. Installation. Installation of the fan motor
shall be in the reverse order of removal.
a.
Removal.
(1) Remove the condenser fan (para 4-31).

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